Attachment-plug.



PATENTED FEB. 26, 1907.

0. J. KLEIN. ATTACHMENT PLUG. A PPLIO ATION FILED APR. 21, 1906.

; INVENTOH WITNESSES UNITED STATES PATENT OFFICE.

CHARLES JULiUs KLEIN, on NEW YORK, Y., ASSIGNOR TO RALPH ABRAHAM SCHOENBERG, on NEW YORK, N. Y.

ATTACHMENT-PLUG.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed April 21. 1906. Serial No. 312.964.

' ing in the borough of Manhattan, in the city,

county, and State of New York, have invent ed certain new anduseful Improvements in Attachment Plugs, of which the tolllowing'is a-specification. 1

This invention relates to electrical connections, and more particularly to electrical connections of the class customarily known as connection-plugs and it has for its object to provide improvements of the character re- .ferred to which shall be superior in simplicity and inexpensiveness of construction and posi- .tiveness and convenience in operation and general efficiency and which shall possess superior advantages with relation to the method of connection of and for the protectionof the conductors or conductor cord or cable. w

I will now describe my invention with reference to the accompanying drawings and then point out the same in appended claims.

' In the drawings, Figure 1 is a central longitudinal sectional view of a connection-plug embodying the invention. Fig. 2 is atop plan view of the same. Fig. 3 is a transversesectional view of the same, taken upon the line 3 3, Fig. 1 looking in the direction of the connected arrows. Fig. 4 is a similar. view taken upon the lincf4 4,Fig. 1, and looking in the direction of the downwardly-pointed arrows. Fig. 5 is asimilar View taken upon the line 5 5, Fig. 1, and looking in the direction of the upwardly-pointed arrows. F ig. 6 is a central longitudinal view of a modified form of construction, and Fig. 7, is a top plan View tl'ercof.

(.orrcspomling parts in all thefigurcs arc denot ed by the same reference characters.

Retcrring with particularity to the drawing, the improved electrical connection or connection -plug comprises two separable members A ard B, which are joined together i or separated from each other upon the line t 4, Fig. said two members being jointly provided with operative connection means which jointhc two members together in swiveled relatro but which still provide for conyenient a 'd readv r lative separation of the members, the two members so joined together being adapted for connection with the receiving device, such as a plug-socket. (Not shown.)

The circuit wires or conductors which are led into connection with the connection-plug are illustrated in the drawing as consisting of two separate conductor-wires D and E, respectively, and said wires are directly con nected with the member B, being brought therefrom into electrical connection, respectively, with two circuit members F and G, respectively, which latter circuit members are carried by the member A. Electric connections H constitute a path from the conductor E to the circuit member F, and electric connections K establish a path from the conductor D to the circuit member G.

A preferred form of construction, operative connection, and relative arrangement of parts and members of a connection-plug comprising the invention as illustrated in the accompanying drawing is as follows: The body member A comprises a generally-cylindrical body portion 6, provided with the customar-y inclosing threaded metallic shell 7 fon connection with the customary threaded socket, .and said body 6 is provided with a central longitudinally-extending metallic stem, pin, or screw 8. The end portion of the body portion 6 adjacent to the body member B is provided with an annular chamber 0, in which is arranged a metallic annulus or annular bead 10 of convex interior curvature. T he bead 10 is electrically connected with the shell 7 by a metallic screw 11, and the shell screw 11, and head it) constitute jointly the circuit member G. The screw 8 holds to the end portion of the body portion 6 adjacent to the body member B a metallic plate 12, provided with a plurality of outwardly-projocting' curved spring-prongs 13, and said plate 12, spring-prongs 13, and screw 8 comprise the circuit member F. The inner end 14. of 'tlic'scrow 8 and the shell 7 are adapted tor connection with circuit members or connection parts in the plug-receiving socket in the customary manner. The body member B comprises an annular body ortion 15, of suitable insulating material, w iich is adapted to abut against the chambered IOC end portion of the bodyportion 6 ofthe body member A when the members A and B are operatively connected, the central openingannular body portion 15, being detachably lo and take into the body portion 15.

connected with the latter by a plurality of screws 19, which pass through said cap 17 The electrical connections H comprise a bindingscrew 20, (with which the conductor 8 is electrically connected,) connected with the body portion 15, and a connection-plate 21, whic is held to the body portion by the bindingscrew and projecting interiorly of the chamber 18 within the cap 17, being pro vided centrally thereof with an annular head 22, formed and arranged to embrace within itself, in electrical contact therewith, l the curved spring-prongs 13 upon the plate 12 when the body members A and B are fitted together. The electrical connections K comprise a binding-screw 23, with-which the conductor D is electrically connected, and a curved metallic plate 24, arranged diametrically opposite to the binding-screw 20, and which is bound centrally upon the body portion 15 by the bindingscrew 23, and provided with a plurality of downwardly-ranging curved metallic spring-prongs 25, which extend through the central opening 16 in the -body portion 15 and into the annular chamber 9 when the members A and B are operatively connected, closely binding upon and against the metallic bead 10 in electrical contact.

It will be'seen from the above that the con-- ductor E is connected with the circuit member F through the binding-screw 20, the connection-plate 21, and the head 22 thereof, which engage with the prongs 13. It will also be seen that the conductor D is electrically connected, with the circuit member G by the binding-screw 23, the metallic plate 24, and the prongs 25, which contact with the metallic bead 10.

As most clearly shown in Fig. 1, the prongs 13, because of their curved or irregular form andtheir spring quality, constitute, with the head 22 and the plate 21, lockingmeans M, and the prongs 25, because of their curved or irregular formation and their spring ual ity, constitute, with the bead-10, lee ,3-

and such turning of thebody member the body member A does notin any way in-' such relation. that said members may be relatively separated as above set forth and are when operatively connected capable of turning one with relation to the other upon the longitudinal axis of said members, the members A and B thus being separably held together by the locking means M and N in swiveled connection.

Referring to Figs. 6 and 7, the body member A, which is in all other respects similar in its construction to that described with respect to the other figures, is provided with a grip member 0, whereby it may be manipulated in connecting the member A with and.

disconnecting the member A from its receiving-socket or other fixture. is preferably formed of insulating material and may consist of a rin 26, of hard rubber or other" suitable materia ,which is preferably or flanged edge portion 28 of the metallic shell 7, which surrounds the body portion 6, said shell being for this purpose suitably pro- The member 0 formed with an interior annular slot 27, which receives the projected outwardly bentv jected beyond said body portion at the endthereof which is provided with the chamber 9. The method of use and advanta es ofthe improvements herein described will e readily 1 understood from the foregoingdescription, taken in connection with the accompanying. drawing and the following statement: The

bodymembers A and B with their contained prongs 25 shall enter the chamber. '9 and bind tightlyv upon the bead 10 and the prongs 13 shall pass through and bind upon the head 22 of the plate 21. With thebodymember A screwed into the customary socket the body member B with its connected con-- ductors D and E may bezreadily turned in either direction upon the body A,- said members A and B now beingswiveled' to ether, upon terfere with the maintenance of the normal electrical circuit conditions in the conductor E, the electrical connections and circuit member F, on the one hand, and in the con ductor D, the electrical connections K, and

the circuit member G on-the other hand.

The conductors D and E are readily con-'- beingfirst led .through the perforation or I opening in the cap 17.

Thep'onvenience-and quickness with which the body members A and B can be connected and disconnected by use of the locking means electrically connected, providing that fiGXi-I M and N, herein described, are apparent. I

The inclusion of those locking means in the electrical connection features of the device results in simplicity of construction and the obviation of duplication of parts.

With reference to the modified construction shown inFigs. 6 and 7 the grip member 0 enables the body member A to'be readily manipulated in connecting the same with and disconnecting-the same from the rece1vof any current-consuming devices or mechanism with which the said conductors may be ble connection between the current-consuming device and the connectiomplug which most effectually conserves the best working conditions and the prevention of injury to the conductors.

Whereas I am aware that in the prior art there are examples of connection-plugs members of which are swivellyconnected and also examples of connection-plugs in which members are detachably connected, I am not aware that connection-plugs or attachment-plugS are found comprising two members which are at the same time detachably and swivelly connected! Accordingb to this invention the members are detacha 1y connected in such manner that they may be detached or separated one from the other without distinct manipulation 'of any locking means, such as screws, nuts, &c. The looking means which are employed and which are compris'edin the. circuit members of the device are so constituted as to yield in their holding function to the exertion of relatively slight strain or pressure.-- In other words, in

the use of this invention to connect-the two membersrand set up the working-current-carrying conditions the two members are simply brought together under pressure, and to relatively separate the two members and terminate current-carrying conditions thetwo members are ,simply urged or drawn apart without any distinct disconnecting manipulation of minoror auxiliary parts.

I do not desire to be understoodas limiting myself to the specific construction, rel

ative arrangement, and connection ofparts and members herein described, but reserve the right to vary the same in adapting the same to varying conditions of usewithout;

departing from the spirit of the invention or the terms of the following claims.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. An electrical attachment-plug, comprising two separably and swivelly operatively connected bpdy members jointly provided with means for maintaining electrical circuit conditions, and locking means detachably uniting said body members and comprised within said means for maintaining electrical circuit conditions. i

'2. 'An electrical attachment-plug, comprisingtwo body members separ'ably and swivelly operatively connected, one of said body members being provided with circuit members, and the other of said body members being providedwith electrical connections respectively adapted for electrical contact with' said circuit members, and locking ineans detachably uniting said body memers.

3. An electrical attachmentlug, comprising. two body members separa ly and swiv-- elly operatively connected, one of said body members being provided with circuit members, and the other of said body members being provided with electrical connections respectively adapted for electrical contact with said circuit members, and locking means detachably uniting said members, said locking means being comprised within said electrical connections and circuit members. I

4. 'An electrical attachment-plug, comprising two body members, one of which is provided with two circuit members, said body member being provided with a chamberedportion and with a metallic beadin said chambered portion, constituting one of said circuit members; the other of said body members being provided with electrical connections adapted for contact respectively with saidcircuit members, said latter. body member being provided with a plurality of metallic spring-prongs constituting one of said electrical connections, and arranged for electrical contact and locking engagement with said metallic-bead carried by t e former body member whereby said body members are detachably and swivelly operatively connected.

5. An electrical attachment-plug, comprising two body members, one of which is provided with two circuit members, one of said circuit members comprising a plurality ofspring-prongs, the other of said body members being provided with electrical connections adapted respectively for electrical contact with saidx'circuit members, the latter body member being provided with an annular metallic plate arranged for electrical contact and locking engagement with said springprongs wherebysaid body members are'dc tachably and swivelly operatively connected.

& i 845,712

6. Anelectrical attachment-plug,compriscircuit members, and locking means where- 10 ing two separably and swivelly operativelyby said members are detachably united connected body members, one of said body In testimony whereof I have signed my members being provided with circuit memname to this specification in the presence of bers, and the other'of said body members betwo subscribing Witnesses.

ing provided with electrical connections and CHARLES JULIUS KLEIU. withbinding-screws adapted to hold -electrical conductors, said-electrical. connections being adapted for electrical contact with said Witnesses: MICHAEL R. MATTEO,

BENJAMIN B. HOFFMAN. 

